﻿using System;
using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Imaging;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using System.Web.Security;
using Portal.Nhibernate.Repository;

namespace Portal.Web.Areas.Admin.Controllers
{
    public class LoginController : Controller
    {
        private readonly IUserRepository<IUser> _userRepository;
        public LoginController(IUserRepository<IUser> userRepository)
        {
            _userRepository = userRepository;
        }
        public LoginController()
        {
            _userRepository = new UserRepository();
        }
        public ActionResult Index()
        {
            return View();
        }
        [HttpPost]
        public ActionResult Login(string userName, string password, string code)
        {
            if (string.IsNullOrEmpty(userName.NullSafe().Trim()))
                return Json(new AjaxResult { state = false, message = "用户名不能为空" });
            if (string.IsNullOrEmpty(password.NullSafe().Trim()))
                return Json(new AjaxResult { state = false, message = "密码不能为空" });
            if (string.IsNullOrEmpty(code.NullSafe().Trim()))
                return Json(new AjaxResult { state = false, message = "验证码为空" });
            if (Session["code"] != null && code.ToLower() != Session["code"].ToString().ToLower())
                return Json(new AjaxResult { state = false, message = "验证码输入不正确,请重输" });
            var model = _userRepository.Get().SingleOrDefault(o => o.Account == userName && o.Password == password);
            if (model == null)
            {
                Session["code"] = null; return Json(new AjaxResult { state = false, message = "用户名或者密码错误" });
            }
            //加入from验证票据
            FormsAuthentication.SetAuthCookie(userName, true);
            return Json(new AjaxResult { state = true, message = "登入成功" });
        }

        [HttpPost]
        public ActionResult LoginOut()
        {


            FormsAuthentication.SignOut();
            return Json(new AjaxResult { state = true, message = "退出成功" });
        }

        public ActionResult Expired()
        {
            return View();
        }
        public void Code()
        {
            string chkCode = string.Empty;
            //颜色列表，用于验证码、噪线、噪点  
            Color[] color = { Color.Black, Color.Red, Color.Blue, Color.Green, Color.Brown, Color.Brown, Color.DarkBlue };//Color.Orange,
            //字体列表，用于验证码  
            string[] font = { "Times New Roman", "MS Mincho", "Book Antiqua", "Gungsuh", "PMingLiU", "Impact" };
            //验证码的字符集，去掉了一些容易混淆的字符  
            char[] character = { '2', '3', '4', '5', '6', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'J', 'K', 'L', 'M', 'N', 'P', 'R', 'S', 'T', 'W', 'X', 'Y' };
            var rnd = new Random();
            //生成验证码字符串  
            for (int i = 0; i < 4; i++)
            {
                chkCode += character[rnd.Next(character.Length)];
            }
            var bmp = new Bitmap(100, 40);
            Graphics g = Graphics.FromImage(bmp);
            g.Clear(Color.White);
            //画噪线  
            for (int i = 0; i < 2; i++)
            {
                int x1 = rnd.Next(100);
                int y1 = rnd.Next(40);
                int x2 = rnd.Next(100);
                int y2 = rnd.Next(40);
                Color clr = color[rnd.Next(color.Length)];
                g.DrawLine(new Pen(clr), x1, y1, x2, y2);
            }
            //画验证码字符串  
            for (int i = 0; i < chkCode.Length; i++)
            {
                string fnt = font[rnd.Next(font.Length)];
                var ft = new Font(fnt, 24);
                Color clr = color[rnd.Next(color.Length)];
                g.DrawString(chkCode[i].ToString(CultureInfo.InvariantCulture), ft, new SolidBrush(clr), (float)i * 20 + 8, (float)8);
            }
            //画噪点  
            for (int i = 0; i < 10; i++)
            {
                int x = rnd.Next(bmp.Width);
                int y = rnd.Next(bmp.Height);
                Color clr = color[rnd.Next(color.Length)];
                bmp.SetPixel(x, y, clr);
            }
            //清除该页输出缓存，设置该页无缓存  
            Response.Buffer = true;
            Response.ExpiresAbsolute = DateTime.Now.AddMilliseconds(0);
            Response.Expires = 0;
            Response.CacheControl = "no-cache";
            Response.AppendHeader("Pragma", "No-Cache");
            //将验证码图片写入内存流，并将其以 "image/Png" 格式输出  
            var ms = new MemoryStream();
            try
            {
                bmp.Save(ms, ImageFormat.Png);
                Response.ClearContent();
                Response.ContentType = "image/Png";
                Response.BinaryWrite(ms.ToArray());
                Session["code"] = chkCode.ToLower();
            }
            finally
            {
                //显式释放资源  
                bmp.Dispose();
                g.Dispose();
            }

        }

    }
}
